const { DataTypes } = require('sequelize');
const connect = require('./connect');

/*
   type: DataTypes.STRING,
      allowNull: false,
      defaultValue:'',
      comment: '名',
*/
function format(m) {
  m.href = `/course/${m.cid}/${m.id}`;
  m.coverimg = `${m.video}?vframe/jpg/offset/1`;
}
const model = connect.define(
  __filename.slice(__dirname.length + 1).replace('.js', ''),
  {
    id: {
      type: DataTypes.INTEGER,
      autoIncrement: true,
      primaryKey: true,
      comment: 'id',
    },
    cid: {
      type: DataTypes.INTEGER,
      allowNull: false,
      comment: '课程id',
    },
    title: {
      type: DataTypes.STRING,
      allowNull: false,
      comment: '标题',
    },
    status: {
      type: DataTypes.TINYINT,
      defaultValue: 0,
      comment: '状态',
    },
    video: {
      type: DataTypes.STRING,
      allowNull: false,
      comment: '视频',
    },
    weight: {
      type: DataTypes.INTEGER,
      defaultValue: 100,
      comment: '权重',
    },
  },
  {
    comment: '章节',
    hooks: {
      beforeFind(option) {
        if (!option.order) {
          option.order = [['weight', 'asc']];
        }
      },
      afterFind(m) {
        m && (Array.isArray(m) ? m.forEach(item => format(item)) : format(m));
      },
    },
  }
);
module.exports = model;